<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>模拟打字效果</title>
</head>
    <style>
        div{
            border-right: 3px solid #000;
            overflow: hidden;
        }
        @keyframes a{
            width:
        }
    </style>
<body>
    <div>我感觉啊啊啊啊 啊啊啊啊 啊</div>
</body>
</html>